Hearth for smelting-furnaces.



hymn-7579222.. i. PATENTEQ'APR. 12,19%.

A. R. 'PARTRIDGR HEARTH FOR SMELTING FURI\TACBS.;-l APPLIUATION FILEDomas. 1900. BHNEWBD JULY sa, 190s. yNo MODEL. I

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VilniTTnn TaTns Patented `April l2, 1904.

llnTnNT @Trice .ililillf R. i .\li'l`llll)(l `i. (lF SAN FRANCISCO,(,lillilFURNlA, SSIGNOR 0F ONE-HALF T() FRANK XV. PAGE, OF SAN'.FRANClSUO, CALIFORNIA.

HEARTH FUR SWllEILTlNGi-F'UFNACES.

SPECIFICATIONformiz-ig part'of Letters Patent No. 757,222, dated April12, 1904.

Application filed October 22,1900.l Renewed July 22, 1903. Serial No.166,637. (No model.)

To nil '//iz'mib if muy concern,.-

Be it known that l, Annan R. lm'rnrnun. a citizen ol the United States,residing ati San Fi'amfisco, in the county ol' San Francisco and 5 Stateol (lalifornim have in vented ce1-tai n new and useful improvements inllearths jfor hlnn-:lt-inzer-Furnaccs, olf which the vfollowingl is aspeciiication.

My invention relates to the treatment of io copper, molten and otherorcs und niattes for the reiining, and desulurzation of the saine, andcomprises a novel construction ot' the hearth or crucihle oi'asmeltiug-urnace .for accomplishig the Stated purpose.

15 ln the drawings, Figure l is un elevation of the lower part oi' afurnace and its hearth, the. latter being' partly 'broken away to show asoction ol the interior. Fig. 2 is n plan View, partly in section.

zo 'ifhe hearth or crucihle A is shown in couinecticn with asmoking-furnace B, which may he ol any suitable construction. l prefer,however. the construction ci' furnace described in my application forLetters Patent, Serial 25 No. l0,760, liled Merch 30, 1900, in which theturnaceis supported independently of the hearth and issepnrated from it,so as to forni a d raft-space l. T he hearth A is portable, beingsupported hy rails C and carrying wheels D 3o above the pit lil. 1 A

El? are hinged doors constituting` a drophottoin, as shown in dottedlines.v

'ille hearth is adjustable toward and from the unici ter in order todiminish or increase the 3 size of the draft-spuce, and so regulate thedraft, the Tuijustnient heine; conveniently el l'ected hy the screws 2and hanftwheels 3.

'lhe hearth is lined, as sh Wn at i", with lireu clay or other suitablerefractory material and l0 is provided with the dischi1-rp;o-spout ilfor 'molten material and with the slag-spout 5.

As a special improvement in hearths for sineltors l make the' metalliccasing of the hearth double, so as to provide a writer space 45, orjacket G, and provide meansiior the circulation oi' water therein inorderto reduce the t-(miperatnrc ol the casing, and so prolong its lifeby tending,r to prevent warping and other destructive effects of theintense heato its molten contents. Supported upon the 'frame 5G or haseol' the hearth is a water-,pipe lL'ex tending around the hearth, fromwhich riso the pipes ll. Frein each pipe il a branch, provided with acock t, extends into the waterjacket. l,Yater-discharge pipes leadingfroin- 5 the jacket are shown at l, which preferably discharge into theexterior waterway S for slag, and the water-inlet to 'pipe il, whichsupplies water from any suitable source, is shown at J. Natur can thushe admitted to 5 the jacket at one, more, or all of a number ofsupply-points` so as to cool the casing at inany dil'lerent points. asdistinguished from a jacket having a single discharge between which thewaiter circulates 'exposed to great` heat. E15

lhe principal part of my invention relates to the introduction of airunder pressure directly into the hearth, wherelgiy the molten mass canhe relincd or desull'urizcd without transfer to converting; plants. Forthis pur- 7@ pose an air-inlet pipe .l is connected to an eirforcingdevice or compressor. (Not shown.) This pipe enters an air space oraccumulator L, which extends around the hearth ahovethe hase und whichfills with air under pressure. 7 lgealirui,r from this space atintervals around the hearth are twyers M, provided with valves 8, thejets or nozzles of which are carried through the water-jacket and theheinth-linu ing und open into the interior at a suitable 50 height toforce oxygen into the molten uiatte through any or all of such nozzles.

lf the ore under treatment contains an iron hase without copper or withonly a small percentage o i the latter and it is desired to concentrateor reline the resultant matte, the operation conducted in the saine,manner.

The uct of injecting oxygen into the iron matte will cause a largequantity of the iron to become oxidized und liow oil as silicate ol o@iron in the slag,precipitating the precious metals, owing to the higherspecilic gravity, tothe hot-tono of the crucihie. This operation iscarried on until the show by assay that they contain precious metals. itthis of, time l hoven very higl1lyconcentrated piatte, or.. in otherworden matte highly charged withprecious metals, thereby making it pos-Lft operation.

L concentration.

Ela

sible to concentrate a large number of tons of ore into a very smallVolume of matte at one The usual mode of procedure in the art is toresmelt the mattes in combination with .clean silica, thereby obtaininghigher In the present practice any approximation to the result which Iobtain can only be secured by a resmelting 'of the matte with cleansilica at great additional expense, since it requires two or moreoperations instead of one where my apparatus is employed.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

l. In a hearth or Crucible for a smelter, a double wall or casing forthe same forminga waterespace, extending continuously and en'- tirelyaround the hearth, a water-supply pipe ALLEN R. PARTRIDGE.

Witnesses: L. W. SEELY,

F. M. BURT.

